typo fix

Summary:
Wrong brace used for a str.format() call - caused a crash when
no universal test image is found for a compose.

Test Plan:
Check that tests still run. Ideally try testing a compose with
no universal image (e.g. a Rawhide nightly with no boot.iso).

Reviewers: garretraziel, kparal

Reviewed By: kparal

Subscribers: tflink

Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D384

openqa_trigger/openqa_trigger.py

@@ -162,7 +162,7 @@ def jobs_from_fedfind(ff_release, arches=VERSIONS):
                 bestimg = img
                 bestscore = score
         if not bestimg:
-            print("No universal tests image found for {0)!".format(arch))
+            print("No universal tests image found for {0}!".format(arch))
             continue
         print("Running universal tests for {0} with {1}!".format(
             arch, bestimg.desc))